In his weekly address, al-Maliki said his Cabinet is exerting huge efforts to ease the suffering of displaced people, mostly Shiites and Christians who were driven out by last month's lightning offensive waged by the extremist Islamic State group and allied militants. The rapid advance by the extremist group, which captured Iraq's second-largest city Mosul and overran much of northern and western Iraq, plunged the country into its worst crisis since the withdrawal of U.S.